module Roda::RodaPlugins::AdditionalRenderEngines::InstanceMethods

default any or any additional engines, return the original path.
the first path that exists. If no template path exists for the
using each of the render engines, in order, returning
If the template path does not exist, try looking for the template

def template_path(opts)
  orig_path = super
  unless File.file?(orig_path)
    self.opts[:additional_render_engines].each do |engine|
      path = super(opts.merge(:engine=>engine))
      return path if File.file?(path)
    end
  end
  orig_path
end